Fuel-pump for oil-engines.



G. D. POGUE. FUEL PUMP FOR 0". ENGINES. APPLICATION mm res. n, 1916.

Patented Jan. 29, 1918.

2 SHEETSSHEET 1.

POGUE.

FUEL PUMP FQR OIL ENGINES. Agvumvrmn FILED H23. 1% 1916.

11L 7 Patented Jan. 29,1918.

2 SHEETS-SHEET 2.

'lutel qn -themletionistiznke of the plunger,

STATES Perm manner 15. 20mm; 01" ST. LOUIS, MISSOURI.

-' v TUEL-PUMPVFOII. orb-Ensures.

Specification of Letters Patent.

OF IC Patented James, 1918.

. Odd g; applieatinn'flled July 19, 1615, Serial No. 40,878. Divided and this a'ppllcattonflled February 11,

' To all whom it'm'cay concern: i "Be it. known that I, Gitom'u-z I). POGUE, a citizen of'thc United States, iesidingyt St. Louie;-l\ [iswuri,-l'1eve invented ueert-um new 5' and: useful Impnovemetitin Fueblumps for Oil-Engines, of which ,the. following is t full clearfend exaet-descfition, such as will euable-others fikilled-in-l 2- Mt to which-it upipertailis-to makeond use the smne.

This nvention relutes'to. variable feed miner-p 1p)s .for:oil-engins the present appliention 1 l ie'atioh: Serial. No. 40,678; filed July 19. l5, "for improvements in variable -r a --"*.T- hc-*'object of "my present m-veutiou is; pioiiide gjfil'lfljlfl" feed. fuel pump. that. is -'perticuler-.y.adapted for use with iuternul -eoinb1istio'n f engines-"0f, the type that are rsl urte'cl' w ith some-0th eruim'lj pm than liquid fuel, said pump comprising means for-cans- I lugthe'sturtingimecliuIn turbo, cut off or mp- 1 illu'ei'l-iiioperutivcend-for mumng the liquid "fuel to be supplied to the engine after the enginewlm-s nttaineclspeed; Figure. 1' of the drawings: is n vcrlllcml trnnei'crse sectionulw'lcw of mullihcylih- (lulpump constructed in accordance with my invention I: is efperspcctirerimv of a cum shaft ioiipcruteswith'. the :eetuuting levers for ipplug blocks. uwe herein; illlIRl-I'fllld my invention Eliflll' iu 1| 'multi-eyllmler vn riuhle' feed h'wili is so-llc'filgliml-llmt Hie-connectg'Ezllw-k "of m c-l1 p11mger epe-rutlup; mec 1 n ulsm i5. tri pped uutomatwnl ly Sooner or a ml to \urytheudcgrce efi-nmvemcutvimmm tel-he; pllmger mi inc-displacement stroke, and. thus regulate the supply from llwfc vl-imlcr. l-n'il l wish it to he ltntlerstum'l. 111ml my invention isnol limited ton multirime-r pump or (on pump in which the g: l 'nm cllng-(l(-\7lcv of the phu n er-operating tiv'c mum suction hlroke of the plunger, n's

eing m dwlls on of my -eopendiug 1 Fig.2 ts an enlarged .rear levuhomrl view forhohlin'g; 'sa 1 (l-'slnift= in adjusted. position;-

1916. Serial No. 77,628.

my invention is applicable to a pump of the v general type referred to, in which the connecting device of the plunger-operating nwchauism islrippecl or rendered inoperative sooner or later on the discharge stroke of the lungei', Furthermore, whllel have herein illustrated only one type of? connectin device. or connecting element for establls ing connection between the fixed-stroke member and the variable-stroke member of the pluuger-opemtin mechanism, and have illustrated only one arm of tripping device for rcnilcringsakl tripping element inoperative, I Wish it to be understood tlmt it in iimneter'ial, so fur as my brou'tl idea is concorned what particular kind of connecting element iuicltripping device are e|.uplo vc(l.

So long is said cooperating part-s are so (icsigno'cl and arranged that the variablestrolce member of the plunger-operating mechanism will be automatically (llSCOIP uectccl from lhe fixed-stroke member M such a period in the eycIe-of'uperat-ions-of the pump that the supply from the'pump will v'ury.

Referring designates the plungers of a n'mlli-cylimler pum a, much of which rceiprocules in cvlinde provided with an inlet valve uml one;

or more discharge valves, A sopagzzte and.

distinct operatin mechunir is provided for each of the p lingers A hill! :1 ll of said -ilungcr-upemtiug lIHKllilIllSlllS are propelled or uetimtcrl from a single crunli shaft llmt is driven by some suitable means. (not to the drawings, which'illus- I (rate the preferred form of my invention. A

all

shown), seicl shaft (,3 having a pllu'ulity of cranks, each of which is connected by means of a. connecting link 3 with one of the pl'unger-opvruting nrcclumisum, the cranks on lhc shaft G either mung-set at the same I an iv, ns'herein shown, so thin in l of the cyl in ens will operate'silnultuncous y. or set at different angles so tln'il; the cylinders will op-.

erateprogregsively, or one aftcrthe other. While I have stated that the plnnger-o wmb ing mechanisms erc-opcmtcd'by the crank,

shaft, it will. of course, be understood that it is immaterial what particular means is emplayed forum-tinting the plungcnoperuting mechanisms. Each plun cr-opomt ingmcelr unjsm consists f a fix st-roke member or primary actua ng member I). a ru'riahh s1 rokc meuilu-r E and u cmlnwllngdevll'c F tlmt is mlvrpoflml hehveen the mum-hem D' trated consistin and E so as to im art movement to the variable-stroke mom or E when the fixedstroke member D moves in one direction. In the pump herein shown the connecting de vice F is so arranged thatit will move the variable-stroke member when the fixedstroke member is moving on its suction stroke. On the dis lacement stroke of the plunger the v'ariab e-stroke member E is moved positively b the fixed-stroke member J). The member which constitutes the primary actuating member of the plun er operating mechanism, is preferably cy indrica'l-shaped, and the upper end of same is bifurcated so as to receive the link 8, said parts beingrpivotally connected together b a pin 3". e lower end of the member is also bifurcated or slotted so as to form a housing for the connecting device F which is pivotally connected thereto by a removable in 4. The two side parts of the bifurcate portion of the lower end of the member D are connected together b an element 5 so as to produce a strong an rigid structure, the connectin element herein illuso a ring 5-scrcwed onto the lower end 0 the member D and provided at its upper end with" a vertically-disposed flange that fits in an annular vove in the lower end at the member D .V, e variable stroke member E is ani'anged in longitudinal alincmen't with the member D and is provided at its upper end witha hook: shaped portion 7 that projects upwardly into the slot in the lower end/ct the member D, so that the hook or projection 7v thereon will cooperate with the hook or projection 8 on the connectin devivF as shown in Fig. 1. The varia le-str kememberE is provided with a cylindrical shank 9- that fits in a guidewayformed in a transverse member 10 of the frame of the 1pump, and the primary actuating member also-fits a guide-way formed in a transverse member 1 of the frame of'the pum that is arranged above the member 10. The plunger 'A is se curely connected to the'lower end 01'': the variable-stroke member E in some suitable manner so thatit w'illbe moved positively upward y and downwardly by the member E. i

On the displacement stroke of the primary actuating member D the] ring 5 at the lower end ofsaid member bears u on a head 9 on thevariable-stroke member and thus positively moves the plunger A downwardly. On the return stroke or upward stroke of the primary actuating mcmber D the connecting device F thereon which is normally held in engagement with the hook-she ed portion at the upper end of the varialestroke member E means of a spring? causes the member l to move upwardly until the connecting device is tripped be; 'a means that will be hel'einafter descri ed.

- s y into h a Position thatal'l-of "e The space between the transverse members 10 an 11 is closed at the front'b a remov.-

able cover plate 19, as shown in ig. 1, and

at the rear of said space is a cover late 20 which carries certain elements of t e tripmg mechanism with which the connecting evices F coiiperate.

The mechanism for governing the-supply from the pump consists of a plurality of tripping devices that trip the connecting devlces' F or cause said connecting devices to be rendered inoperative sooner or later on the suction stroke of the plunger-operating mechanisms. A tripp' device is provided for the plunger-operating mechanism of each cylinder, and all of said tripping devices are under the control of an automatic governing device. When m improved pumpis used in connection wit an internal combustion engine for feeding fuel to the cyllnders of the engine, the. means that controls said tripping devices will be 0 eratively connected with the governor o the engine, so as to cause the connecting devices F of the respective cylinders to be tripped soonerf or later on the suction strokes of the plungers, according to the speed of the-engine, thus causing varying quantities of, fuel oil to be drawn into the cylinders of the pump and thereafter'fed to the cylinders of 95 the engine on the displacement stroke of the plungers. In order that the plunger-operatix mechanism of one cylinder may be 1 rend ered inoperative, so as to cut onecyline at ng mechanisms. I have also consfli icted scald mechanism in such a manner that allof the tripp ng devices can be moved sl'mllltt't' plunger-operating mechanisms are" mam tained in'aninoperative'condition. In-various t es of internal' 'combus'tion engines with'w lchmy improved pump canbeIu' successfully it is customary to start th v gine by means of compressed air, an electricmotor or some other suitable. sour power and then throw the fuel suppl into operation, so as to feed fuel to th inders after the engine-has reached no speed. In order that this may-be eff e'nsil I have prcvided'my pump witha or trolling means that governs the medi n used to start the engine and also governs pump, said means being so constructed that the pump will come into operation auteur ou my and "supply" liquid fuel to the cylin'd of. the engine after the starting meansc muss .beencut ofl', or rendered imperative.- The such 'a'manner that each of saiddevices F .wil-l bel disengagedfrom its cooperating variable-stroke member before the primary actuatinglmember D that carries-'saiddevice' reaches its upper limit o:f moven ient. The blocks 'G are slidin"ly' mountcd 1n slots or guideways in th'epate 20 and are retained III operative positionin said plate by meansof fkeep'ers or cover 'plates'.

Each ofsairl block's ihas Ia flat surface a: that lies parallel tofthe .airis. of the main moving parts and also, .an'finclined or oblique surface 3 as shown ingFi g; 1; the position of said surfaces bcing such that the-friction roll .30 of each connectingdevice' F willtravel over. the inclinedsurface y of itsvcoiipe'rating tripping block. and'then onto the" surface 00 on -said *blockdu'ring thefupward stroke of the pri maryactuating;.-me inber' D, the movement that is imparted to the connecting-device F, by reason of the roll;;thereon coming into engagement; 'Wi'th the tripping block G, causin sa idconnecting device F to beautomatiea 1y dlsehga'ged from the variable-stroke member with "which it cotiperates. Each of "the tripping'blocks-G is provided with an actuating lever H which is connected to same by meansof fa" ball-shaped, or substantially ball' shaped," head'J3l on the leverthat projectsflintoa cylindrical holein the rear side of theblock The levers H are mounted on a rock" shaft"32which extends transversely of the pump and-which ismounted inbear ings 33 onthep1ate20 or some-other:- suit able part otthel'friime. When the pump .is

f used'lnyeonnection with an internaicornbus tioneng'lneior feeding. -fuel oil to the cylinthe s eed--o collar-I5 1;

de p of the'engi etthe rock shaft 32 Wlll'TbB I nnected vvith the automatic imi 0 5 th t: the'==-po change-wire lthe-co la r, 1 g of the governor mov'es upjand, down; owing to vari ation ingeisa s-m the governor ,ghqwnin- Fi 1. Tlie actuating levers jH are"looselyg'qnouhted on the rock shaft 3'2,frandifadjustable meansa are provided for determiningitheigposition; of said levers with relationto" said shaft; saidmeans preferahly- 1 consisting of; adjusting screws 37 mouuted' in: lugs fo ruied on, rigid, collars 38 onus'aid shaft and-coiipe'ratmgwith stops or shoulders 39 on said actuating =levers- Each of thetripping blocksG is under the e engine in" such. .al'; manner onn ofs'saidr, r k s a ft will s said tripping block;

influence of a spring 40 which tends to move said'block upwardly, and thus cause the projection 39 on its coiiperating actuating lever to bear against the adjustlng screw 37, as shown in Fig. 1. By adjusting the screw 37 the position of the tripping block that 00- operates with said "screw can be changed relatively to the governor-controlled shaft 32 that operates the lever H. In a multi- I my invention limited to the particular means herein illustrated. Furthermore, 'it

immaterial-Mintparticular form of mechanism is employed. for actuating the tripping blocks, but I prefer to use a'inechanism of substantially "the construction shown, because it comprises comparatively few parts that can be easily assembled and adjusted, which parts are of such a design that lost motion is reduced to a minimum.

A cam shaft 3 that extends transversely. across theframe-of the pump in proximity. to the rock shaft 32 is provided with a pin rality of camskilthot coiiperate with the actua'ting levers H and move them downwardly into such a position that all of the connecting devices will be held out of engagement with the variable-stroke members E wit lrwhich they cooperate, each actuating leveuH beingpreferably provided with a, friction roll 42-that is arranged in-such a position that it willbe engaged. by 1500 operating cam .41 when the cam ShaftJ is .-.-turn e.d into a certain position. In'addition tothe zneans just described for-holding the connectlng dev1ces-. F in an. inoperative position, I'have provided-each of-the tripping .bldcks Hwith a, hook 43 that is adaptedto be engaged by a plunger 44, shown in' Fig; 1,

when the tripping block is movedt=downa wardly belowits normal, position, by pulling; on thehandle 45 of fthe-le'ver H thatactuates Ifit is desired-wort one of the pump out of comrnission'iwithou-t afifiectingt-he remaining. cylinders,- the. operas of, the cylinders tor inchargep'fthe pumpflgIrasps the-handle 45 0f the actuating lever with the tripping block of theoyl'indefr that it is desiredto render inoperative and-pulls said handle. rearwa rdly far enough to cause the hook 43 at the lower end of the tripping :that eciiperates block tqbee'n 'geii by the spring-pressedv I plunger 44. T ereifilter, the variable-stroke member of the pluupnoperatingmechanism'r with which saIdbIGckcoiipe'rates will re- 1130f main at rest while the other plungers of the pump continue in operation.

The'cam shaft J is also utilized to govern a medium that is employed to start the engine with which the pump is used. During the interval it is requlred'to bring the engine from rest u to approximately norh al speed it is desire le to stop the delivery of fuel to the cylinders of the pump, otherwise abnormal pressures might be developed within the cylinders, which would subject the frame, shaftand related parts to dangerous stresses. After the engine has been brought up to approximately normal speed it is, of course, desirable to cut olf or render inoperative the medium that started the engine and throw the pump into service in the short est possible time, so as to not lose the momentum stored up in the fly wheel of the engine between the time when the starting medium is discontinued and the introduction of fuel into the cylinder begins. It is, of course, also desirable to have these two separate connect-ions so interlocked that they cannot possibly occur at the same time. My

' improved pnmp is so designed that it acc'onr I plishes the desirable features above men tioned, for, as reviously stated, the'cam shaft J that renders the tripping blocks inoperative is also utilized to govern the medium which starts the engine. In case compressed air is used as the medium to startthe engine, a valve .50 that governs the supply of compressed airis combined with a va vc-pperating device 51 that is under the control of a cam 52 on the camshaft J. When saidcam shaftJ is in such a position that the came 41 thereon hold the tripping blocks G depressed or in such a osition that the connecting devices F of t e plunger-operating mechanisms are rendered inorative, the cam: 52, on said cam shaft J'will permit the valve or other device that; controls the startingmedi'uni to remain o norinan operative condition. While t e engine. is

building up i driven" y to starting medium, the primary actuating" members D of the plunger'operatin mechanisms reciprocate back and with tha'en no, but the plunger's fort if the crank shaft C is connected in'the pump 'cylin era remain at .rest. Consequently, no fuel is drawn into the pump cylinde'lfi After the engine has-"reached. apprpi'ilhatcly normal speed, 7 the 'cam' shaft J i turned insuch a direction {that the cam 52 therdon will close the valve :50, and thus cut off the starting medium, the continued enough to release the connecting devius l i far movement of the cam shaft inj'this' direction causing the cams 41 thereon toQbe moved out of engagement with the actuating levers H, so that said levers and their coiiiperating tripping blocks can move 1pw=.au Far speed, or'w-hile it is being the connecting devices F will be released progressively. The cam shaft J is provided at one end with a handle 53 for turning said shaft, and means are rovided for locking said cam 'shaft in adiusted position, one means that may be used for this urpose consisting of a spring-actuated locking device 54, shown in Fig. 4 gthat cooperates with 11 notched disk 55 on die cam shaft. "If desired, the handle 53 can be provided with a pointer 56 that travels over a dial 57 provided with the words Stop, Starting and Running," or other suitable indicia, so as to assist the operator in adjusting the cam shaft J. When the pointer 56 stands at the word Stop the cams 4-1 on the cum evices condition. hen the cam shaft J is in this position the plungers of the pump remain at rest ev en though the primary. actuating.

members of the plunger-operating 1nechanisms are set in motion. Whenthe cam shaft J is turned into such a position that the pointer 56 stands opposite the word Starting on the dial, the cam 52 on said shaft permits the valve 50 to o n, and thus causes the engine to he starts by the me him which said valve controls, the cams 41 being so arranged that they; still hold the nctuatin levers H in'their depressed position, an thus prevent the valiable-stroke members of the plunger-operating mechanisms from moving when the primer. actu-' sting members, D are set-in motion y the starting of the engine.' After the engine "has reacheda. proximateljhormsl speed,

the cam shaft pas-turned in such a direction that the pointer-58 travels toward the-word so; as to reventsaid cani shattfrom toughened 1n the, wrong-direction, or, in "other words, revent the several functions just-n ienfioneg from Bein .imnre a stnrte performed in an rative for connecting 'ce'nfter'i eenfgine has been t as rting'medinm. .In-some p desirable to arrangethe cams 41 on the cam shaft J in'such a manner that one or more of the pump .plungerswill remain'in action .While the engine is being started by an'external starting force. It is -of course, immaterial, so .far as my broad ideais concerned, 'what particular medium used for this urpose-comprising a controlling device W12 I the cam shaft or by the means that efl'ects" the manual adjustment of thetripping '1 blocks. I

I '..'Ha'.ving'thus described my invention, What I claim, and desire to secure by Letters Patsent, is 1 a 1 fuel pum'p'for supplying liquid fuel teen-internal combustion engine vwith a plunger-operating mechan sm that.

' is used to start the engine, and While I have hereinillustrated an fairline and a control ling valve for starting the, engine, it will be obvious that v'arious other means, could be ose' position is determined by providedv comprises a primary actuating member that I moves when F iinent to the; plunger of the necti'ng' device for the en 'ne is in operation, a move-.

ump and a con-- transnutting movement fr mon'e of said members to the other, a

tripping device ,for rendering said cnnecting device inoperative sooner or later on one so stroke'pf ,saidp un ear-operating mechanism,

v a'me'chani'sm comblned with the governor ofthe engine for controlling s'aid-trippin \de- .vice, a manually-operated means for 0Idingconnecting dense in an inoperative conditlon so as-to' cause the variable-stroke memb r to. remain at rest when the primapy I actuating member is in operation, and ailevice on r the control of said manuallyvariabIe-stroke mem operated means for operated means for governing a medium that is used to start t e on me.

2. A fuel pump for supp ying liquid fuel to an internal combustion eng ne comprises aprimary actuating member that moves whenthe en no is in operation, a

r that imparts m ove-' mentto the plum r. of the from one of said members to the other, a

tripping device for rendering said connectmg device inoperative sooner or later on one stroke of said plunger-operating mechanism, a mechanism'combined with the governor of the engine for-co'ntrollin' said-tripping de vice, a-manually-operate means for holding said connecting device in an inoperative condition so. as to cause the variable-stroke membento remain at rest when the primary actuatin member is in 0 eration and a deer the control of said manuallyoverning a medium vice un Witnesses v WnnLsL. CHURCH,

Gnome. Baimwnm.

starting medium; ,device of the plungenoper- GEORGE D. POGUE rovided 1 with a plunger-operating. mechanism that pump and a c0nnectmg dOVlGQ or transmitting movement.

e engine, said manu- 

